const toString = Object.prototype.toString;
export function is(val, type) {
  return toString.call(val) === `[object ${type}]`;
}
export function isDef(val) {
  return typeof val !== 'undefined';
}
export function isUnDef(val) {
  return !isDef(val);
}
export function isObject(val) {
  return val !== null && is(val, 'Object');
}
export function isEmpty(val) {
  if (isArray(val) || isString(val)) {
    return val.length === 0;
  }
  if (val instanceof Map || val instanceof Set) {
    return val.size === 0;
  }
  if (isObject(val)) {
    return Object.keys(val).length === 0;
  }
  return false;
}
export function isDate(val) {
  return is(val, 'Date');
}
export function isNull(val) {
  return val === null;
}
export function isNullAndUnDef(val) {
  return isUnDef(val) && isNull(val);
}
export function isNullOrUnDef(val) {
  return isUnDef(val) || isNull(val);
}
export function isNumber(val) {
  return is(val, 'Number');
}
export function isPromise(val) {
  return is(val, 'Promise') && isObject(val) && isFunction(val.then) && isFunction(val.catch);
}
export function isString(val) {
  return is(val, 'String');
}
export function isFunction(val) {
  return typeof val === 'function';
}
export function isBoolean(val) {
  return is(val, 'Boolean');
}
export function isRegExp(val) {
  return is(val, 'RegExp');
}
export function isArray(val) {
  return val && Array.isArray(val);
}
export function isWindow(val) {
  return typeof window !== 'undefined' && is(val, 'Window');
}
export function isElement(val) {
  return isObject(val) && !!val.tagName;
}
export function isMap(val) {
  return is(val, 'Map');
}
export const isServer = typeof window === 'undefined';
export const isClient = !isServer;
export function isUrl(path) {
  const reg = /^http(s)?:\/\/([\w-]+\.)+[\w-]+(\/[\w- .\/?%&=]*)?/;
  return reg.test(path);
}
